import React from 'react';
import Canvas from './Canvas';
import './App.css';

function useInput(initialValue = '', target = 'value') {
  const [value, setValue] = React.useState(initialValue)

  const setter = e => {
    setValue(e.target[target])
  }
  return [
    value,
    setter
  ]
}

function saveSvg(svgData, fileName) {
  var svgBlob = new Blob([svgData], { type: "image/svg+xml;charset=utf-8" });
  var svgUrl = URL.createObjectURL(svgBlob);
  var downloadLink = document.createElement("a");
  downloadLink.href = svgUrl;
  downloadLink.download = `${fileName}.svg`;
  downloadLink.click();
  URL.revokeObjectURL(svgUrl);
}

function convertSvgToImg() {
  
}


const App = () => {
  const [name, setName] = useInput('Admin')
  const [fontSize, setFontSize] = useInput(64)
  const [color, setColor] = useInput('#c62828')
  const [fontFamily, setFontFamily] = useInput('Fredericka the Great')
  const [bold, setBold] = useInput(false, 'checked')
  const [italic, setItalic] = useInput(true, 'checked')

  const big = {
    width: 1024,
    height: 1024 * 0.618 / 2
  }

  return (
    <React.Fragment>
      <div dangerouslySetInnerHTML={{ __html: '<a href="https://github.com/djyde/Picas" class="github-corner" aria-label="View source on GitHub"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#FD6C6C; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a><style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>' }} />
      <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center', padding: '36px 0' }}>
        <div style={{ width: big.width }}>
          <Canvas
            padding={0}
            text={name}
            width={big.width}
            height={big.height}
            color={color}
            fontFamily={fontFamily}
            fontSize={fontSize}
            bold={bold}
            italic={italic}
          />
        </div>

        <div className="controls">
          <label>
            文本: <input defaultValue={name} onChange={setName} />
          </label>

          <label>
            系列:
            <select onChange={setFontFamily} value={fontFamily}>
              <option key="Fredericka the Great" value="Fredericka the Great">Fredericka the Great</option>
              <option key="Revamped" value="Revamped">Revamped</option>
            </select>
          </label>

          <label>
            大小:
            <input defaultValue={fontSize} onChange={setFontSize} type="number" />
          </label>

          <label>
            前景色:
            <input className="input" defaultValue={color} onChange={setColor} type="color" />
          </label>

          <label>
            加粗:
            <input defaultChecked={bold} onChange={setBold} type="checkbox" />
          </label>

          <label>
            倾斜:
            <input defaultChecked={italic} onChange={setItalic} type="checkbox" />
          </label>
        </div>
      </div>
    </React.Fragment>
  )
};

export default App;
